Methanogenic degradation of toilet-paper cellulose upon sewage treatment in an anaerobic membrane bioreactor at room temperature. (March 2017)

• Record Type: Journal Article
• Authors: Chen, Rong; Nie, Yulun; Kato, Hiroyuki; Wu, Jiang; Utashiro, Tetsuya; Lu, Jianbo; Yue, Shangchao; Jiang, Hongyu; Zhang, Lu; Li, Yu-You
• Is Part Of: Bioresource technology. Volume 228(2017)
• Page Start: 69
• Page End: 76
• Publication Date: 2017-03
• Subjects: Anaerobic membrane bioreactor -- Sewage -- Toilet-paper cellulose -- Methanogenic degradation -- Room temperature; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.12.089
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: AnMBR performed high efficient methanogenic degradation of sewage at 25 °C. Sludge yield was determined as 0.08 gMLVSS/gCODremoval . Toilet-paper cellulose with rich but refractory carbon source was fully degraded. Degradation of toilet paper could provide 26% of total methane production. Long SRT and co-digestion contributed to biodegradation of toilet-paper cellulose. Abstract: Toilet-paper cellulose with rich but refractory carbon sources, are the main insoluble COD fractions in sewage. An anaerobic membrane bioreactor (AnMBR) was configured for sewage treatment at room temperature and its performance on methanogenic degradation of toilet paper was highlighted. The results showed, high organic removal (95%), high methane conversion (90%) and low sludge yield (0.08 gVSS/gCOD) were achieved in the AnMBR. Toilet-paper cellulose was fully biodegraded without accumulation in the mixed liquor and membrane cake layer. Bioconversion efficiency of toilet paper approached 100% under a high organic loading rate (OLR) of 2.02 gCOD/L/d and it could provide around 26% of total methane generation at most of OLRs. Long sludge retention time and co-digestion of insoluble/soluble COD fractions achieving mutualism of functional microorganisms, contributed to biodegradation of toilet-paper cellulose. Therefore the AnMBR successfully implemented simultaneously methanogenic bioconversion of toilet-paper cellulose and soluble COD in sewage at room temperature.